JP2003156219A - Mixing unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate installation work and maintenance work of a combination unit 1, in the combination unit 1 comprising a flow pipe assembly having a water supply connection port 20 for taking cold water, a hot water supply connection port 30 for taking hot water from a hot water supply device, and a tapping connection port 40 for supplying it to a hot water taking device that connect the hot water supply device to the hot water taking device, and a body case 10 for storing the flow pipe assembly. SOLUTION: A pair of facing first side plate 11 and second side plate 12 of the body case 10 are removably mounted to the body case 10. In the flow pipe assembly, respective connection ports 20, 30, and 40 project from a pair of third side plate 13 and fourth side plate 14 other than the first side plate 11 and second side plate 12 of the body case 10, and supported by the side plates 13 and 14 other than the first side plate 11 and second side plate 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses, for example, a hot water supply device including a solar water heater using natural energy and a water heater using various kinds of waste heat to take out hot water from a water heater or a washing machine. It is a technique relating to a housing mode of a hot water mixing unit for connecting to a device in a main body case, which constitutes the hot water mixing unit.

[0002]

2. Description of the Related Art A solar water heater which is the hot water supply device and a hot water heater which is an auxiliary heat source which is the hot water extraction device are provided so that hot water of a desired temperature can be taken out regardless of the weather. A solar hot water supply system connected by a hot water mixing unit is known.

As shown in the schematic view of FIG. 6, the solar hot water supply system is generally equipped with a solar water heater 5 arranged on the roof of a building, a place where hot water is actually taken out such as a kitchen or a bathroom, or its place. From the water heater 7 disposed in the vicinity, and the solar hot water from the solar hot water supply circuit 56 of the solar water heater 5 disposed between the solar water heater 5 and the water heater 7, and the water supply circuit 59 connected to the water source. It is composed of a hot and cold water mixing unit 1 for a water heater, which takes in cold water, mixes it, and feeds the mixed water to the water heater 7 through a water inlet circuit 77 connected to the water heater 7. Generally, the hot water mixing unit 1 for the water heater
Is placed on the floor surface in a state of being adjacent to the wall surface in the vicinity of the water heater 7 or attached to the wall surface and installed in another state.

The hot and cold water mixing unit 1 for the water heater is shown in FIG.
As shown in FIG. 5, the solar hot water supply circuit 56 is provided at the upstream end.
A hot water circuit 3 having a hot water supply connection port 30 connected to the water supply port, a cold water circuit 2 having a water supply connection port 20 connected to the water supply circuit 59 at the upstream end, and the hot water circuit 3 and the downstream ends of the cold water circuit 2 Are connected to each other, and the hot water of the hot water circuit 3 and the cold water of the cold water circuit 2 are mixed to form a mixed water of a predetermined temperature, and a hot water mixer 6 extending from the hot water mixer 6 and at the downstream end A water pipe assembly including a mixed water circuit 4 having a tap water connection port 40 connected to the water circuit 77, a unit controller for controlling the hot and cold water mixing unit 1 for a water heater and a main power source (not shown here), The main body case 10 has a rectangular parallelepiped shape that accommodates the above-mentioned components.

As shown in FIG. 7, in the water pipe assembly, the water supply connection port 20 and the hot water supply connection port 30 are provided so as to facilitate connection to the solar hot water supply circuit 56, the water supply circuit 59, and the water supply circuit 77. The hot water outlet port 40 is housed in the main body case 10 so as to project outward from the left side plate 14 of the main body case 10 and to project outward from the right side plate 13, and the water conduit assembly and the unit Each component such as the controller and the main power source is the main body case 1
It is fixed to 0 by screwing. Further, the front plate 11 of the main body case 10 is detachably attached to the main body case 10 in order to perform maintenance and parts replacement of the hot water mixing unit 1 for the water heater.

[0006]

However, in the hot water / water mixing unit 1 of this embodiment, the hot water supply connection port 30 connected to the solar hot water supply circuit 56 from the solar water heater 5 and the water input of the hot water supply device 7 are introduced. Since the hot water outlet connection ports 40 connected to the circuit 77 are respectively projected from the left side plate 14 and the right side plate 13 of the main body case 10, the solar hot water supply circuit 56 and the water intake circuit are installed at the installation location of the hot water mixer unit 1. When 77 is located on the left and right opposite to the connection ports 30 and 40, the front plate 11 is arranged in the front-rear direction so as to face the wall surface. It is not possible to remove the hot-water mixing unit 1 for the water heater to perform maintenance or parts replacement.

Further, generally, the mounting bracket for mounting the hot and cold water mixing unit 1 for a water heater on the wall surface is the rear plate 1
Since it is provided only in 2, it is difficult to install the hot and cold water mixing unit 1 for the water heater on the wall surface in the reverse direction.

Further, as a method of disposing the hot water / water mixing unit 1 for the water heater so that the front plate 11 can be removed, the connection ports 20, 30, 40 of the solar hot water supply circuit 56 and the water input circuit 77 are projected. Reverse side plates 13, 1
Although a method of extending the water to a water temperature of 4 may be conceivable, when the piping is complicated and the appearance is not good and the water inlet circuit 77 is extended, the mixed water adjusted to an appropriate temperature by the hot water mixing unit 1 for the water heater is provided. The temperature is cooled by the influence of the outside air temperature and the like while passing through the water inlet circuit 77, and the appropriate temperature water is supplied to the water heater 7.
May cause inconvenience that it cannot be supplied to

The present invention has been made in view of the above circumstances. "The cold water circuit provided with the water supply connection port for taking in the water from the water source at the upstream end and the hot water from the hot water supply device at the upstream end are provided. A hot water circuit provided with a hot water supply connection port to be taken in, a hot and cold water mixer for adjusting the mixing ratio of the cold water and the hot water at the confluence of the cold water circuit and the hot water circuit, and a confluence point extending from the confluence and at the downstream end. Water pipe assembly having a mixed water circuit provided with a hot water connection port for sending the mixed water of the above to the hot water extraction device, and each connection port of the water supply connection port, the hot water supply connection port, and the hot water connection port protrudes outward. In a hot water mixing unit having a rectangular parallelepiped-shaped main body housing for accommodating the water pipe assembly in such a manner, it is an object of the present invention to facilitate installation work and maintenance work of the hot water mixing unit.

[0010]

[Means for Solving the Problem] * 1 The technical means of the present invention for solving the above-mentioned problems is that "a pair of the first side plate and the second side plate facing each other of the body case is the body case. Is detachably attached to the
In the water conduit assembly, the connection ports project from a pair of opposing third side plate portions or fourth side plate portions other than the first side plate portion and the second side plate portion of the main body case, and the first side plate portion. And is supported by a side plate portion other than the second side plate portion ”. Here, the side plate parts other than the first side plate part and the second side plate part include not only the third side plate part and the fourth side plate part from which the connection pipes project but also the first side plate that constitutes the main body case. To the side plate part other than the fourth side plate part.

According to this, since the first and second side plate portions are removably arranged, the third case of the main body case is provided.
Or, depending on the positional relationship between each connection port protruding from the fourth side plate portion, each circuit connected to each connection port for supplying water to and supplying water to the main hot water / water mixing unit, and each pipe for discharging hot water from the main hot water / water mixing unit. The first hot water / water mixing unit is located on the front side of the main hot water / water mixing unit, whichever of the first and second side plate portions faces the wall surface.
Also, the second side plate portion can be removed. Since the water conduit assembly is housed in the main body case so as to be supported by the side plate portions other than the first and second side plate portions,
It does not hinder the attachment and detachment of the first and second side plate portions.

* In the item 1 of paragraph 2, "the first side plate part and the second side plate part are formed in a shape that can be exchanged with each other", depending on the installation direction of the main hot water mixing unit. Since the first side plate portion and the second side plate portion can be exchanged with each other, the precautions for handling the hot and cold water mixing unit for the water heater and the product label are attached to either one of the first and second side plate portions in advance. For example, the front plate of the main body case can be formed. In addition, similarly, a mounting bracket for a wall surface may be provided on the other of the first and second side plate portions to form the back plate of the main body case.

* 3 In the item 1 or 2, "In the water conduit assembly, all of the connection ports are projected from either one of the third side plate part and the fourth side plate part, and Supported by only the side plate portion ", each connection port is projected from only one of the third and fourth side plate portions, so that each connection port is provided on both the third and fourth side plate portions. The space required for installing the hot and cold water mixing unit is smaller than that of the structure in which the hot and cold water mixing unit is installed separately, and two adjacent ones of the other of the third and fourth side plate parts and one of the first or second side plate parts. Since both side plates can be disposed so as to face the wall surface, they can be installed at the corners.

* In the paragraph 4 item 3, "the water passage assembly is a pipe joint for a cold water circuit, a pipe joint for a hot water circuit, and a mixture which are fixedly penetrated to either one of the third side plate portion or the fourth side plate portion. Each pipe joint of the water circuit pipe joint, and a cold water circuit water pipe, a hot water circuit water pipe, and a mixed water circuit water pipe that are respectively fitted into the pipe joints in the main body case so as to be freely inserted and removed. The respective water passage pipes are connected to the pipe joints in a fall prevention state by detachable clip members that are externally fitted to the fitting portions with the pipe joints. ” By removing each clip member which holds the fitting portion between the joint and each water pipe by fitting, the portion including each water pipe of the water pipe assembly and the hot and cold water mixer connected to these pipe pipes is connected to each pipe joint. Can be removed from the main body case 10 Because the maintenance and parts replacement part containing the water pipe, and hot and cold water mixing device is easy. Further, the parts including the water pipes and the hot and cold water mixer are taken out to the outside of the main body case, so that maintenance and parts replacement of the pipe joints fixed to the inner surface of the main body case 10 are easy. After maintenance or replacement of parts, after connecting the water pipes to the pipe joints so that they fit into each other, the clip member is externally fitted to the fitting part to restore the original escape prevention state. Can be connected.

Since each of the pipe joints is fixed to one of the third and fourth side plate portions, after removing the clip member, the portion including the water pipe and the hot and cold water mixer is connected to the other side plate portion. Can be easily removed from the pipe joints. Further, when manufacturing the hot and cold water mixing unit of the present invention, it is easy to accommodate and attach the water pipe assembly to the main body case.

* 5 In paragraphs 1, 2, 3, or 4, "in the main body case, a mounting bracket for mounting the main hot-water mixing unit on the wall surface is provided together with the first side plate part or the second side plate part. In the case where the hot water mixing unit is placed on the floor, only the first and second side plate portions are provided in the main body case and the mounting bracket is not provided. can do. When the hot and cold water mixing unit is mounted on a wall surface, one side plate portion facing the wall surface of the first and second side plate portions and the mounting bracket are arranged in a main body case and can be installed on the wall surface. Therefore, any installation method can be supported and the installation method can be easily changed.

[0017]

The present invention having the above-mentioned structure has the following unique effects. The hot and cold water mixing unit of the present invention,
Whichever of the first and second side plate portions of the main body case is disposed so as to face the wall surface, the first or second side plate portion located on the front surface side of the main hot and cold water mixing unit can be removed. Maintenance or replacement of parts can be performed by opening the front side of the hot and cold water mixing unit, which facilitates maintenance work. In addition, since it can be installed according to the positional relationship of each pipe at the installation location without being aware of the front and rear of the main body case, the installation work of the main hot water mixing unit is easy.

According to the item (2), the first and second side plate portions of the main body case can be preliminarily formed to specifications suitable for the front plate and the rear plate of the hot-water mixing unit.

According to the third aspect, the space required for installing the main hot water mixing unit is small, and the hot water mixing unit can be installed at the corner portion.

According to the item (4), maintenance and replacement of the water pipe assembly housed in the main body case are easy. In addition, it is easy to accommodate and attach the water pipe assembly to the main body case when manufacturing the main hot water mixing unit.

[0021] According to the item (5), the hot water mixing unit can be installed on either the floor surface or the wall surface, and the installation method of the hot water mixing unit can be easily changed.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following embodiments, a solar hot water supply system that uses a hot and cold water mixing unit for a water heater as an example of the present invention to connect a solar water heater that is a hot water supply device to a hot water heater that is an auxiliary heat source will be described as an example. To do. A schematic diagram of this solar hot water supply system is shown in FIG. First, the configuration of each part of this solar hot water supply system will be described.

* Solar water heater 5 The solar water heater 5 is a heat storage pipe 5 formed so as to circulate between a heat collector 50 that absorbs solar heat and a hot water storage tank 51.
2, the expansion tank 5 is provided in the heat storage pipe 52.
3 and a circulation pump 54 are provided. At the bottom of the hot water storage tank 51, a water supply circuit 55 for supplying cold water from a water source such as water supply and a drainage circuit 58 having a water drainage plug 57 are connected to the bottom, and the hot water storage tank 51 has a hot water storage circuit at the top thereof. A solar hot water discharge circuit 56 for sending hot solar hot water in the tank 51 to the hot water / hot water mixing unit 1 is connected.

* Water heater 7 The water heater 7 includes a water heater main body 70 having a built-in heat exchanger heated by a gas burner (not shown), and various operation / display units (operation switches) electrically connected to the water heater main body 70. , A remote controller 71 having a bath water filling switch, a hot water temperature setting unit, a combustion display unit, etc.), and the hot water heater main body 70 receives the water flow from the hot water / hot water mixing unit 1. Inlet circuit 77 to put in and tap 8 at the tip
5, a hot water outlet circuit 84, a forward pipe 82 and a return pipe 83 used for filling and reheating the bath 81 are connected.

* Hot water / hot water mixing unit 1 As shown in FIG. 6, the hot water / hot water mixing unit 1 is connected at its upstream end to a water supply circuit 59 branched from the solar water supply circuit 55 of the solar water heater 5. A cold water circuit 2 and a hot water circuit 3 having an upstream end connected to a solar hot water circuit 56 of the solar water heater 5, a cold water circuit 2 extending from a confluence of the cold water circuit 2 and the hot water circuit 3, and a downstream end thereof being the water heater. No. 7, a water passage assembly having a mixed water circuit 4 connected to the water inflow circuit 77, and a mixing ratio of cold water and solar hot water flowing into the mixed water circuit 4 are adjusted to obtain a mixed water of a predetermined temperature. The hot and cold water mixer 6, a unit controller 100 for controlling the hot and cold water mixing unit 1 for the hot water supply device, a main power supply 101 for supplying power to the hot and cold water mixing unit 1 for the hot water supply device, and a direct power source for housing the above-mentioned components. Box-shaped body case 10
It consists of and.

As shown in FIGS. 1 to 3, the water pipe assembly includes the water supply circuit 59 and the solar hot water discharge circuit 56.
The water supply connection port 20 of the cold water circuit 2, the hot water supply connection port 30 of the hot water circuit 3, and the hot water connection port 40 of the mixed water circuit 4 which are connected to the water supply circuit 77 are located outside the left side plate 14 of the main body case 10. The main body case 10 in a projecting manner
It is housed in. In addition, the unit controller 1
00 is connected to a wiring cable connecting the water heater 7 and the remote controller 71 so that information can be transmitted and received to and from the hot water controller which is built in the water heater 7 and controls the operation of the water heater 7.

* Operation of Solar Hot Water Supply System Next, the operation of the present solar hot water supply system comprising the solar water heater 5, the water heater 7, and the hot / water mixing unit 1 for the water heater will be briefly described. This solar hot water supply system is controlled by the unit controller 100 housed in the hot water / water mixing unit 1 for the water heater, and, for example, when the operation switch of the remote controller 71 is turned on to instruct hot water discharge at a certain target temperature, This instruction is transmitted to the unit controller 100, the operation of each part necessary for realizing this instruction is revised and calculated, and each operation instruction is given to each component of the hot water mixing unit 1 for the water heater and the controller for the water heater. Sent. According to this operation instruction, the hot and cold water mixer 6 adjusts the mixed water having a predetermined temperature from the hot water and the cold water of the solar water, and the water heater 7 heats the mixed water to a target temperature and then taps the hot water from the tap tap 85.

The analysis / calculation by the hot / water mixing unit 1 for the water heater is performed by the information from the operation switch or the temperature setting unit of the remote controller 71 obtained through the wiring cable or the electric circuit, the hot water controller in the water heater 7. Information, information from each sensor in the hot water mixing unit 1 for the water heater, and the like. Further, the control unit 100 analyzes and calculates the information transmitted from each sensor to adjust the operation of each part of the solar hot water supply system at any time, and constantly checks whether each part is functioning properly. I'm watching.

* Main Body Case 10 Next, each component of the hot and cold water mixing unit 1 for a water heater will be described in detail. The main body case 10 is a substantially cubic box body formed of a metal plate, and as shown in FIG.
The front U plate 11, the rear plate 12, and the bottom plate 16 with legs are screwed and fixed to an inverted U-shaped member in which the left and right side plates 13 and 14 and the top plate 15 are connected, respectively. A pair of upper and lower mounting brackets 9 and 9 each having a plurality of holes for installing the hot and cold water mixing unit 1 on the wall surface W.
Are attached to the rear plate 12.

The front plate 11 and the rear plate 12 are formed in the same shape so that they can be exchanged with each other, and the reverse U-shaped member of the inverted U-shaped member is inserted through packings 111 and 121 made of an elastic material. It is detachably screwed to the margin portion 18 formed on the edge and the edge 160 standing upright from the bottom plate 16. Further, the mounting member 9 is detachably screwed to the U-shaped member together with the rear plate 12, and the mounting member 9 is similarly attached to the front plate 1.
It can also be attached to 1.

As shown in FIG. 4, the left side plate 14 has a through hole 1 through which the upstream ends of the cold water circuit 2 and the hot water circuit 3 and the downstream end of the mixed water circuit 4 are inserted.
41, 142, 143 and a through hole 140 for inserting a power cord for supplying electricity to the main power source 101 are formed. Further, as shown in FIGS. 1 and 2, a partition plate 17 for mounting the unit controller 100 and the main power source 101 in an isolated state from the water pipe assembly is attached to the inner surface of the right side plate 13. Has been.

* Water passage assembly The cold water circuit 2 is projected to the outside of the left side plate 14 and connected to the water supply circuit 59.
And a chilled water circuit pipe joint 25 provided with a check valve 22 arranged on the inner surface of the left side plate 14 and a chilled water passage pipe 23 provided with a water temperature sensor 27 are connected in this order. The downstream end of the cold water flow pipe 23 is the hot water mixer 6
It is connected to the. Further, the water supply connection port 20 is provided with a water drain plug 200 with a filter having both a dust removing function and a draining function in cold water.

The hot water circuit 3 is provided with a hot water supply connection port 30 which is projected to the outside of the left side face plate 14 and is connected to the solar hot water discharge circuit 56, and a vacuum breaker 38 disposed on the inner surface of the left side face plate 14. Hot water circuit pipe joint 35 including a normally-closed solenoid valve 39, which is a safety valve, and a check valve 32
And a hot water circuit water pipe 33 having a hot water temperature sensor 37 are connected in this order, and the downstream end of the hot water circuit water pipe 33 is connected to the hot water mixer 6.
Further, the hot water supply connection port 30 is provided with a water drain plug 300 with a filter which has both a dust removing function and a draining function in the warm solar water.

Here, the hot water mixer 6 is a cold water control valve 21 disposed at the confluence of the cold water circuit 2 and the hot water circuit 3.
And a hot water control valve 31 disposed in the hot water circuit 3 on the downstream side thereof. The cold water control valve 21 and the hot water control valve 31 correspond to the corresponding pulse motors 210, 31.
Rotation of 0 causes the valve element at the tip to move the water pipes 23, 3 for each circuit.
The inlet and outlet are located at the downstream end of 3 to change the openness of the outlet to adjust the inflow of cold water and solar hot water.

The mixed water circuit 4 includes a mixing circuit water pipe 43 connected to the downstream side of the hot water mixer 6, and a water amount sensor 42 arranged on the inner surface of the left side plate 14 for measuring the flow rate of the mixed water. And mixed water temperature sensor 47 and abnormality monitoring sensor 48
And a pipe joint 45 for a mixed water circuit including
4 is connected in this order to the hot water outlet connection port 40 that is connected to the water inlet circuit 77 while protruding to the outside, and the water pressure of the mixed water circuit 4 is excessively increased at the hot water outlet connection port 40. There is provided a water drain plug 400 also having the function of an overpressure relief valve that opens the valve to release the pressure.

Further, in this example, the connection ports 20, 30, 40 of the water passage assembly have ends connected to the circuit pipe joints 25, 35, 45 at the left side plate 14 respectively.
Are respectively screwed and fixed to the outer surface of the left side plate 14 in a manner of inserting the respective pipe through holes 141, 142, 143, and the respective circuit pipe joints 25, 35, 45 are connected to the respective connection ports 20, 30. , 40 are fixed to the inner surface of the left side plate 14 with screws.

The water flow pipes 23, 33, 43 for each circuit are
The pipe fittings 25, 35, 45 are fitted in the respective pipe fittings 25, 35, 45 so that they can be inserted and removed freely.
Clip members 26, 36, and 46 connecting the water pipes 35 and 45 to the water pipes 23, 33, and 43 in a fall prevention state are detachably connected to each other.

The water temperature sensor 27, the hot water temperature sensor 37,
Mixed water temperature sensor 47, hot water mixer 6, normally closed solenoid valve 39,
Each electric component such as the water amount sensor 42 and the abnormality monitoring sensor 48 is electrically connected to the unit controller 100 described above.

* Clip members 26, 36, 46 As shown in FIG. 5, the clip members 26 are formed on the cold water circuit pipe joint 25 and the cold water circuit water pipe 23, and when they are connected to each other. A groove portion 610 having a groove width that can be externally fitted to the flange portions 250 and 230 that are joined in an overlapping state and that can hold the cold water circuit pipe joint 25 and the cold water circuit water pipe 23 in a falling-off prevention state. A pair of left and right holding members 61 having a substantially semi-circular shape and the flange portions 250 and 230 can be externally fitted and held in the natural state as described above, and the left and right holding portions can be provided by applying a force so as to be sandwiched by fingers or the like. 61, 61 and an operation knob 60 that is connected so as to be elastically deformable so as to open in a V shape.

Due to such a structure, the operation knob 60
It is possible to easily attach or detach to the flange portions 250 and 230 in the joined state by sandwiching and holding the holding portions 61 and 61 to open the legs. The clip members 36 and 46 used in the hot water circuit 3 and the mixing circuit 4 also have the same structure as that used in the cold water circuit 2.

With the above-mentioned structure, the hot and cold water mixing unit 1 of this embodiment has the front plate 11 and the rear plate 12 detachably attached to the main body case 10. Even when installing 11 so as to face the wall surface W, maintenance work is easy because the rear plate 12 located on the front side of the hot water mixing unit 1 for water heater can be removed for maintenance or component replacement. Further, since the hot and cold water mixing unit 1 for a water heater can be arranged without being aware of the front and rear surfaces of the main body case 10, the installation work is easy.

Further, since the respective connection ports 20, 30, 40 are all projected from the left side plate 14, the space required for installing the hot and cold water mixing unit 1 for the water heater can be small, and the rear plate 12 and the right side plate can be installed. The hot and cold water mixing unit 1 for a water heater can be installed in a corner portion where both face plates 13 face the wall surface.

In this example, the clip member 2
By removing 6, 36, 46, the water pipe assembly housed in the main body case 10 can be partially removed and taken out to the outside of the main body case. Therefore, maintenance and parts replacement of the water pipe assembly can be performed. It's easy. Further, when the hot water mixing unit 1 for the water heater is manufactured, the main body case 10
It is easy to store and install the water conduit assembly in the.

In this example, since the mounting bracket 9 is detachably screwed to the main body case 10 together with the rear plate 12 and the front plate 11, when the hot and cold water mixing unit 1 for a water heater is placed on the floor surface. When the upper and lower mounting brackets 9, 9 are not mounted, the rear plate 12 is screwed to the main body case 10, and when mounting on the wall surface W, the mounting bracket 9.9 together with the rear plate 12 is mounted. Since it can be dealt with only by fixing it to the main body case 10 with a screw, the configuration of the main body case 10 can be easily changed according to each installation method. Further, the installation method of the hot / water mixing unit 1 for a water heater can be easily changed between mounting on the floor surface and mounting on the wall surface.

* Other Embodiments In the above-mentioned example, the water pipe assembly has the connection ports 20,
Although all of 30 and 40 are accommodated in the main body case 10 in such a manner that they are projected from the left side plate 14, the water supply connection port 20 is provided from the left side plate 14 as in the case of the prior example of FIG.
Alternatively, the hot water supply connection port 30 may be projected and the hot water supply connection port 40 may be projected from the right side plate 13 to be housed in the main body case 10.

In the above example, the front plate 1
1 and the rear surface plate 12 are molded so as to have the same shape and configuration, but in the case where the front surface plate 11 and the rear surface plate 12 are molded so as to be interchangeable with each other, the hot and cold water mixing unit for a water heater 1 according to the installation direction of the front plate 11
Since the rear plate 12 can be replaced with the rear plate 12,
For example, the precautions for handling the hot and cold water mixing unit 1 for water heaters, product labels, etc. can be attached to the unit 1, wiring diagrams necessary for maintenance work can be attached, and a window can be provided to check the inside of the case from the outside. It is possible to form the specifications suitable for the front side of the hot water mixing unit 1 for a water heater.
Further, similarly, the mounting bracket 9 can be arranged only on the rear plate 12, or a plate material which is not coated for cosmetics is adopted to form the specifications suitable for the rear surface facing the wall surface. be able to.

In the above example, the hot and cold water mixing unit for the hot water heater, which connects the solar water heater 5 and the hot water heater 7 of the auxiliary heat source in the solar hot water supply system, is taken as an example. The hot water supply device is not limited to use in a hot water supply system, and may use various waste heat.The hot water extraction device is a device that uses hot water such as a washing machine in addition to the water heater. It may be.

[Brief description of drawings]

FIG. 1 is a front view of a hot water mixing unit for a water heater according to an embodiment of the present invention with a front plate removed.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a side view showing how the hot and cold water mixing unit for a water heater is attached to a wall surface.

FIG. 4 is an exploded perspective view of a main body case of the hot and cold water mixing unit for a water heater.

FIG. 5 is an exploded perspective view showing a connected state of a cold water circuit pipe joint and a cold water circuit water pipe.

FIG. 6 is a schematic diagram of a solar hot water supply system using the hot and cold water mixing unit for the hot water supply device according to the embodiment of the present invention.

FIG. 7 is a perspective view showing a conventional hot and cold water mixing unit for a water heater.

[Explanation of symbols]

(1) ・ ・ ・ Hot water mixing unit for water heater (10) ・ ・ ・ Main body case (11) ・ ・ ・ Front plate (12) ・ ・ ・ Back plate (13) ・ ・ ・ Right side plate (14) ・ ・ ・ Left side plate (2) ・ ・ ・ Cold water circuit (20) ・ ・ ・ Water connection port (23) ・ ・ ・ Water pipe for cold water circuit (25) ・ ・ ・ Cold water circuit fittings (26) (36) (46) ・ ・ ・ Clip member (3) ・ ・ ・ Hot water circuit (30) ・ ・ ・ Hot water connection port (33) ・ ・ ・ Water pipe for hot water circuit (35) ・ ・ ・ Hot water circuit fittings (4) ・ ・ ・ Mixed water circuit (40) ・ ・ ・ Mixed water connection port (43) ・ ・ ・ Water pipe for mixed water (45) ・ ・ ・ Pipe fitting for mixed water (5) ... Solar water heater (6) ・ ・ ・ Hot water mixer (7) ・ ・ ・ Water heater

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kinji Mori             Rinnai 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi             Within the corporation F term (reference) 3L073 AA02 AA06 AA15 AA18 AB02                       AB07 AB09 AB12

Claims (5)

[Claims] 1. A cold water circuit having an upstream end provided with a water supply connection port for taking in water from a water source, and an upstream end provided with a hot water circuit provided with a hot water supply connection port for taking in hot water from a hot water supply device. A hot and cold water mixer that adjusts the mixing ratio of the cold water and the hot water at the confluence of the cold water circuit and the hot water circuit, and a tap water outlet that extends from the confluence and sends the mixed water at the confluence to the hot water extraction device at the downstream end. A water pipe assembly having a provided mixed water circuit, and a rectangular parallelepiped shape for accommodating the water pipe assembly in such a manner that each connection port of the water supply connection port, the hot water supply connection port, and the hot water connection port projects outwardly. In a hot and cold water mixing unit including a main body case, the pair of first and second side plate portions facing each other of the main body case are removably attached to the main body case, and the water pipe assembly includes: Each connection port is described above The main body case projects from a pair of opposing third side plate portions or fourth side plate portions other than the first side plate portion and the second side plate portion, and is supported by side plate portions other than the first side plate portion and the second side plate portion. There is a hot and cold water mixing unit. 2. The hot and cold water mixing unit according to claim 1, wherein the first side plate portion and the second side plate portion are formed in a shape that can be replaced with each other. 3. The hot and cold water mixing unit according to claim 1 or 2, wherein in the water pipe assembly, the connection ports are all projected from either one of the third side plate portion and the fourth side plate portion. A hot and cold water mixing unit supported only by the one side plate portion. 4. The hot water mixing unit according to claim 3, wherein the water pipe assembly is pierced and fixed to either one of the third side plate part and the fourth side plate part, and a hot water circuit. Pipe joints for water pipes and pipe joints for mixed water circuits, and cold water circuit water pipes, hot water circuit water pipes, and mixed water circuits that are removably fitted to the pipe joints in the main body case. A water passage for use in water, each water passage being connected to each pipe joint in a detachable state by a detachable clip member that is externally fitted to a fitting portion with each pipe joint. Mixing unit. 5. The hot and cold water mixing unit according to claim 1, 2, 3 or 4, wherein the main body case has a mounting bracket for mounting the hot and cold water mixing unit on a wall surface of the first side plate portion or the second side plate. A hot and cold water mixing unit that is detachably arranged together with the unit.